Box not waking up from sleep

Hi,

i have a little problem with my box, sometimes when i put the device to sleep and try to wake it up the next day it doesnt wake up, or maybe it wakes up but no signal on the hdmi. i found out that when that happen if i unplug and replug the hdmi cable to the tv, the box works. has any one run into this issue?

setup:
Minix x8h with the latest 009 firmware

thanks